In Class Midterm Review Flashcards
When NCCs migrate into the mesenchyme, what do they go through?
The EMT
What are NCCs called after they go through the EMT?
Ectomesencyme
Ectomesencyme, which is derived from NCCs, make up parts of what?
The cranium
What embryological tissue makes up the teeth?
Mesoderm and ectoderm
In the bell stage of tooth development, what is underneath the forming tooth?
The pulp and dentin
The Bell stage forms what through reciprocal induction?
Cementum and dentin
What type of bone is the clavicle made from?
Intramembranous bone
From the neck up, what kind of bone is there?
Intramembranou bone
From the neck down what kind of bone is there?
Endochondral bone
What is the tympanic membrane made of?
Pouches and grooves
What does Meckel’s cartilage give rise to?
Incus and Malleus
Does the mandible grow directly from Meckel’s cartilage?
No
Where do odontoblasts come from?
They derive from ectomesencymal cells
Between the inner and outer enamel epithelium, the space is hydrophillic so water is pulled in and the cells look like “stars”. What is this called?
Stellate reticulum
Stuff “underneath the cap”
Dental papilla
When osteoblasts become trapped in matrix, what do they develop into?
Osteocytes
What forms osteoclasts?
The fusion of many cells derived from circulating monocytes in the blood
Where do osteoblasts come from?
They come from the differentiation of osteogenic cells
What is the specific growth center of the bone?
Physis
T/F: The joint grows at a different rate from the shaft
True
For long bones, what is the primary center of ossification?
Diaphysis
For long bones, what is the secondary center of ossification?
Epiphysis
What is enamel derived from?
Ectoderm
What forms the maxilla and mandible, which is also a layer over the ectomesenchyme?
Dental lamina
What’s the name of mineral in bone, dentin and cementum?
Hydroxyapatite
What tissue of the tooth is technically “dead”?
Enamel (no vascularization)
Amelogenesis is the formation of ameloblasts from what tissue?
Inner enamel epithelium
What’s the name of the second arch?
Reichert’s cartilage
